/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.iotdb.tsfile.write.record.datapoint;

import org.apache.iotdb.tsfile.exception.write.UnSupportedDataTypeException;
import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType;
import org.apache.iotdb.tsfile.utils.Binary;
import org.apache.iotdb.tsfile.utils.StringContainer;
import org.apache.iotdb.tsfile.write.chunk.ChunkWriterImpl;

import java.io.IOException;

/**
 * This is a abstract class representing a data point. DataPoint consists of a measurement id and a
 * data type. subclass of DataPoint need override method {@code write(long time, IChunkWriter
 * writer)} .Every subclass has its data type and overrides a setting method for its data type.
 */
public abstract class DataPoint {

    /**
     * value type of this DataPoint.
     */
    protected final TSDataType type;
    /**
     * measurementId of this DataPoint.
     */
    protected final String measurementId;

    /**
     * constructor of DataPoint.
     *
     * @param type          value type of this DataPoint
     * @param measurementId measurementId of this DataPoint
     */
    public DataPoint(TSDataType type, String measurementId) {
        this.type = type;
        this.measurementId = measurementId;
    }

    /**
     * Construct one data point with data type and value.
     *
     * @param dataType      data type
     * @param measurementId measurement id
     * @param value         value in string format
     * @return data point class according to data type
     */
    public static DataPoint getDataPoint(TSDataType dataType, String measurementId, String value) {
        DataPoint dataPoint = null;
        try {
            switch (dataType) {
                case INT32:
                    dataPoint = new IntDataPoint(measurementId, Integer.parseInt(value));
                    break;
                case INT64:
                    dataPoint = new LongDataPoint(measurementId, Long.parseLong(value));
                    break;
                case FLOAT:
                    dataPoint = new FloatDataPoint(measurementId, Float.parseFloat(value));
                    break;
                case DOUBLE:
                    dataPoint = new DoubleDataPoint(measurementId, Double.parseDouble(value));
                    break;
                case BOOLEAN:
                    dataPoint = new BooleanDataPoint(measurementId, Boolean.parseBoolean(value));
                    break;
                case TEXT:
                    dataPoint = new StringDataPoint(measurementId, new Binary(value));
                    break;
                default:
                    throw new UnSupportedDataTypeException(
                            String.format("Data type %s is not supported.", dataType));
            }
        } catch (Exception e) {
            throw new UnSupportedDataTypeException(
                    String.format(
                            "Data type of %s is %s, but input value is %s", measurementId, dataType, value));
        }

        return dataPoint;
    }

    /**
     * write this DataPoint by a SeriesWriter.
     *
     * @param time   timestamp
     * @param writer writer
     * @throws IOException exception in IO
     */
    public abstract void writeTo(long time, ChunkWriterImpl writer) throws IOException;

    public String getMeasurementId() {
        return measurementId;
    }

    public abstract Object getValue();

    public TSDataType getType() {
        return type;
    }

    @Override
    public String toString() {
        StringContainer sc = new StringContainer(" ");
        sc.addTail("{measurement id:", measurementId, "type:", type, "value:", getValue(), "}");
        return sc.toString();
    }

    public void setInteger(int value) {
        throw new UnsupportedOperationException("set Integer not support in DataPoint");
    }

    public void setLong(long value) {
        throw new UnsupportedOperationException("set Long not support in DataPoint");
    }

    public void setBoolean(boolean value) {
        throw new UnsupportedOperationException("set Boolean not support in DataPoint");
    }

    public void setFloat(float value) {
        throw new UnsupportedOperationException("set Float not support in DataPoint");
    }

    public void setDouble(double value) {
        throw new UnsupportedOperationException("set Double not support in DataPoint");
    }

    public void setString(Binary value) {
        throw new UnsupportedOperationException("set String not support in DataPoint");
    }
}
